caa a22 4500 606195947 CHVBK 20210128100922.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s10934-015-9997-6 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9997-6 Synthesis of magnetically recyclable MOF-5SiO2Fe3O4 catalysts and their catalytic performance of Friedel-Crafts alkylation [Elektronische Daten] [Qingyuan Li, Sai Jiang, Shengfu Ji, Da Shi, Hongkun Li] Magnetic Fe3O4 particles were synthesized by solvo-thermal method, and then hydrolysis method was used to encapsulate a compact layer of SiO2 on the surface of Fe3O4 particles. Finally, the magnetic MOF-5@SiO2@Fe3O4 catalysts were prepared by in situ coating different contents of MOF-5 on the surface of SiO2@Fe3O4 particles. The as-synthesized samples were characterized by TEM, SEM, XRD, FT-IR, N2 adsorption/desorption, VSM and NH3-TPD. The catalytic activities of the magnetic MOF-5@SiO2@Fe3O4 catalysts for the Friedel-Crafts alkylation of toluene with benzyl chloride were evaluated. The results showed that magnetic MOF-5@SiO2@Fe3O4 catalysts exhibited superparamagnetic property, and could be separated by a magnet from the liquid reaction system. The conversion of toluene was increased gradually with the increase of catalyst contents and reaction temperature, respectively. 97% conversion of toluene has been achieved by using 26.8%MOF-5@SiO2@Fe3O4 catalyst at 120°C for 6h. Furthermore, electron-donating group, such as -OCH3, and -CH3, exhibited positive effect on the alkylation reaction. Besides, the catalyst could be easily separated from the reaction mixture after the reaction and reused for five times without significant decrease in activity. Springer Science+Business Media New York, 2015 Magnetic nationallicence MOF-5 nationallicence Catalyst nationallicence Friedel-Crafts nationallicence Alkylation nationallicence Li Qingyuan State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Jiang Sai State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Ji Shengfu State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Shi Da State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Li Hongkun State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/5(2015-10-01), 1205-1214 1380-2224 22:5<1205 2015 22 10934 https://doi.org/10.1007/s10934-015-9997-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9997-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Qingyuan State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Jiang Sai State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Ji Shengfu State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Shi Da State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Li Hongkun State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/5(2015-10-01), 1205-1214 1380-2224 22:5<1205 2015 22 10934